Maintenance
7-19
AutomationSystem S7-400 Hardwareand Installation
A5E00850741-01
7.11 Replacing Interface Submodules

Available Interface Submodules

Note
Only use interface submodules that are explicitly released for use in S7-400
devices.

Installing Interface Submodules

!Warning
The modules can be damaged.
When inserting or removing interface submodules with power applied, the CPU
and interface submodules can be damaged (exception: using synchronization
submodules in an H system).
Never insert or remove the interface submodules while power is being supplied
(exception: synchronization submodules). Always switch off the power supply
before inserting or removing interface submodules.
!Caution
Danger of damage to persons and property.
Interface submodules contain electronically-sensitive components that may be
damaged if they are touched.
The surface temperatures on the components can reach up to 70oC and there is a
risk of burning.
For this reason, you should always hold the interface submodules on the longest
sides of the front panel.
Observe the ESD guidelines when installing interface submodules.